Registrar Neil Hall said his lengthy record of service and dedication to the group meant he was a "very worthy recipient" of the Golden Lyre award.
Mr Storm joined the choir, in which he sings second tenor, in February 1980.
He progressed through the service badges, culminating in life membership after 25 years of service in February 2005, before his 30-year service badge this year.
After becoming the choir's assistant librarian in 1981, he was soon elected to the office of librarian in 1983.
In 2007, he became the longest-serving librarian in the choir's history.
Mr Hall noted the innovative filing ideas he had brought to the choir's "vast musical library".
"He is constantly sourcing new music from overseas which often requires transposing the music and words to four-part male voice, as well as providing computer access to our conductor on any item in our library."
He was the 36th member to receive the award and performed with the choir at its 376th concert, in the Dunedin Town Hall last night.